[overlord-issues] [JBoss JIRA] (RTGOV-674) ElasticsearchRESTServer proxy blocks on Error

[Sascha Dirbach (JIRA)]

     [ https://issues.jboss.org/browse/RTGOV-674?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sascha Dirbach updated RTGOV-674:
---------------------------------
    Git Pull Request: https://github.com/Governance/rtgov/pull/338


> ElasticsearchRESTServer proxy blocks on Error
> ---------------------------------------------
>
>                 Key: RTGOV-674
>                 URL: https://issues.jboss.org/browse/RTGOV-674
>             Project: RTGov (Run Time Governance)
>          Issue Type: Bug
>          Components: User Interface
>    Affects Versions: 2.0.0.Final
>            Reporter: Sascha Dirbach
>            Assignee: Gary Brown
>
> Hi,
> it looks like the InputStream of the proxyResponse is not closed correctly when there is an exception in org.overlord.rtgov.elasticsearch.rest.ElasticsearchRESTServer.copyResponseContent(HttpResponse, HttpServletResponse)
> This results in a blocking behaviour, as the internally used HttpClient uses a ConnectionPool with the size of 2 connections per host, which will not be released in the above case. 
> We experienced that with a SocketClosedException like this:
> ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/rtgov-ui]] (http-/0.0.0.0:9181-5) ElasticsearchRESTServer: null: ClientAbortException:  java.net.SocketException: Broken pipe
>         at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:403)
>         at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:450)
>         at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:342)
>         at org.apache.catalina.connector.OutputBuffer.close(OutputBuffer.java:301)
>         at org.apache.catalina.connector.CoyoteOutputStream.close(CoyoteOutputStream.java:104)
>         at org.overlord.rtgov.elasticsearch.rest.ElasticsearchRESTServer.copyResponseContent(ElasticsearchRESTServer.java:137)
>         at org.overlord.rtgov.elasticsearch.rest.ElasticsearchRESTServer.service(ElasticsearchRESTServer.java:61)
> After two of these Exceptions the elasticsearch proxy did not react anymore until a server restart.
> A stacktrace of the running server revealed, that the threads are blocked in the connection pool:
> ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/rtgov-ui]] (http-/0.0.0.0:9181-5) ElasticsearchRESTServer: null: ClientAbortException:  java.net.SocketException: Broken pipe
>         at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:403)
>         at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:450)
>         at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:342)
>         at org.apache.catalina.connector.OutputBuffer.close(OutputBuffer.java:301)
>         at org.apache.catalina.connector.CoyoteOutputStream.close(CoyoteOutputStream.java:104)
>         at org.overlord.rtgov.elasticsearch.rest.ElasticsearchRESTServer.copyResponseContent(ElasticsearchRESTServer.java:137)
>         at org.overlord.rtgov.elasticsearch.rest.ElasticsearchRESTServer.service(ElasticsearchRESTServer.java:61)
> Sascha



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